Disk harrow.



Pat'ented Dec. 24, I90i. H. M. BURDICK &. C. H. ROBINSON.

D l S K H A B B U W. (Application filed Sept. so, 189 9.

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DISK HABROW.

(Application filed Sept. 80, 1899.)

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UNrrED STATES PATENT Orrics.

HIRAM M. BURDIOK AND CHARLES H. ROBINSON, OF UTIOA, NEW YORK,

ASSIGNORS TO THE STANDARD HARROW COMPANY, OF UTIOA,

YORK.

NEWV

DISK HARROW.

SPECIFICATION formingpart of Letters Patent NO. 689,574, dated December24, 1901.

Applicationfiled September 80, 1899. serial No. '73 2,173. (No model.

To all whom it may concern:

Be it known that we, HIRAM M. BURDICK and CHARLES H. RoBINsoN, of Utica,in the county of Oneida and State of New York, have invented certain newand useful Improvements in Disk Harrows; and we do hereby declare thatthe following is a full, clear, and exact description of the invention,which will enable others skilled in the art to which it appertains tomake and use the same, reference being had to the accompanying drawings,and to the numerals of reference marked thereon, which form part of thisspecification.

Our invention relates to improvements in disk harrows. The feature towhich attention may be called is theleading disk,arranged to operate onthe strip of ground passing between the adjacent ends of the main gangsof the disks and the mechanism for supporting and handling this leadingdisk.

In the drawings, Figure 1 shows a perspeotive view of a disk harrow ofour improved construction from in front. Fig. 2 is a perspective view ofthe same from the rear. Fig. 3 shows details of the constructionrelating to the leading disk and the means for supporting and adjustingit in connection with one of the gangs of the harrow. Fig. 4 shows insection details relating to a turn-table or plate upon which the leadingdisk is mounted and by means of which it is operated. Fig. 5 shows aplan view of portions of the harrowframe, showing particularly theturn-table or plate on which the leading disk is mounted.

Fig. 6 shows details of the leading disk and the mechanism by which itis secured and operated, as seen from a position in front of the harrow.

The frame consists of a main arched bar 1, extending between the mainbearing-boxes of the gangs of disks.

2 indicates a second frame or draft-bar, which is also bent and archedand extends beween the main bearing-boxes of the gangs. On top of theharrow the bars 1 and 2 are secured to parallel angle-irons 3 3, which,togetli'er with certain small cross-pieces, which it is unnecessary toparticularly mention, constitute the frame of the harrow. To the framein a position between the vertical flanges of the angle-irons 3 3 issecured the pole, and to the frame at the rear end of the pole issecured the seat-springo. The gangs are formed of dished disks 6 6,which, except at the boxes,

are spaced by sleeves 9. The convex faces of the disks of thetwo gangsface each other. The main box 11 of the gang has a bearing on the axisof the gangs and is attached to framebars 1 and 2.

To the forward portion of the frame there is secured a flange-plate 19,which supports a rotatable turn-table or ring 20. This part 20 isprovided with a pair of downwardly-projecting lugs or ears, to which aresecured the upper ends of the arms 21. The lower ends of the arms 21receive and support the bearing of the leading disk 22. The rotatablering ortu rn-table 20 is provided with a lug or ear 20, which isconnected by a rod or link 23 with the adj usting-lever 24 of theright-hand gang of disks. The bearing of the leading disk 22 is furthersupported by a brace 25, which is secured at its upper end at 26 to themain frame. The lower end of the brace is somewhat loosely connectedwith the bearing of the leading disk 22, whereby a certain amount ofplay is allowed for the angular adjustment of this disk. The locationand arrangement of the leading disk is such that it will operate on thestrip of ground which might otherwise pass between the adjacent ends ofthe main gangs when thrown into angular and operative position. Theleading disk 22 is a dished disk similar to the other disks of theharrow and dished or having its concave side facing in the same generaldirection as that of the gang with which it is connected, as specified,and effective in cultivating the ground. The arrangement of the leadingdisk in front of the gang does not materially interfere with turning acorner with the implement in operation, for the reason that in turningcorners the team of horses may back up, throwing up the end of the poleand lifting out of the ground the working edge of the leading disk.

The right-hand gang of disks is angularly adjusted with reference to theframe by means of the following mechanism: On the axle of thegangadjacent to one end there is provided a box 26. Thebox 26 receivesthe fork 2. The combination with adisk harrow haw 27 from the angularbar 28, and the fork is pivoted to the box by the transverse bolt or pin29. The angular bar 28is connected with the main frame by a link 30,pivoted to the main frame and to the bar. The forward end of the bar 28is pivoted to the lower end of the adjusting-lever 24. The lever 24 ispivoted to the main frame at 31, and there is provided a rack 32 and acatch engaging therein,by means of which the position of the lever andthe gang may be maintained. The left-hand gang is operated bysubstantially a duplicate of the lever and connecting mechanism justdescribed, except that there is no connection with'the leading disk 22.When the angular position of the right-hand gang is adjusted, that ofthe leading disk 22 is simultaneously and correspondingly adjusted. Inconnection with each gang of disks there is provided a supporting-bar35, supported in part from box 11 and in part from box 26 by the upright37. On the bar 35 is mounted the scraper-bar 40, which is provided withscrapers 47, adapted to engage the concave surface of the disks andwhich is operated by levers 41.

What we claim as new, and desire to secure by Letters Patent, is-

1. Thecombination withadisk harrowhaving two gangs of disks, ofa leadingdisk pivotally supported from the frame in advance of the gangs, andmeansconnecting said disk with one of the gangs whereby it issimultaneously adjusted with reference to the line of draft,substantially as set forth.

ing two gangs of disks, of a leading disk arranged in the plane of theadjacent ends of the gangs and pivotally mounted on the frame and meansfor adjusting said disk in connection with one of the gangs,substantially as set forth.

3. The combination in a disk harrow having two gangs of disks, of aleading disk arranged in advance of the space between the meeting endsof the gangs and pivotally mounted on the frame in advance of thebearings of the gangs, and means for adj usting one of the gangs andsaid leading disks simultaneously.

4. In a disk harrow, the combination of two disks one gang having itsdisks dished in one direction and the other gang having its disks dishedin the other direction, a dished leading disk arranged in advance of thespace between the adjacent ends of the gangs and pivotally mounted uponthe frame in advance of the plane of the gangs, and means for operatingsaid leading disk to adjust it in connection with the gang which has itsdisks dished in the same direction.

In witness whereof we have aflixed our signatures, in presence of twowitnesses, this 20th day of September, 1899.

HIRAM M. BURDIOK. CHARLES H. ROBINSON.

Witnesses:

E. WILLARD J ONES, SARAH A. BROWN.

